Improvement in the manufacture of cutter-bar heads for harvesters



A.PADGHAM.

Improvement in the Manufacture of Cutter-Bar H eads for Harvesters.

No.116,0884. I 'Patentedjune20,1871.

famr @fi/wl AALFHGI'U'LITHOGRAFH/C an M X I'GSEDRNRSI' PROCESJE/ PATENT OEEIo AMOS PADGHAM, or SYRACUSE, NEW. YORK.

IMPROVEMENT IN THE MANUFACTUREOF CUTTER-BAR Hl-IADS FOR HARVESTERS.

Specification forming part of Letters Patent No. 116,088, dated J une 20, 18 71.

To all whom it may concern:

Be it known that I, AMOS PADGHAM, of the city of Syracuse, in the county of Onondaga and State of New York, have invented certain Improvements in the Construction of the Heel or Head of the Gutter-Bar of a Harvester, of

which the following is a specification Object of the Invention.

One of themost important points to guard against wear in harvester-machines is the joint oonnecting'the pitman with the heel of the knife or cutter-bar. Cllhis point, being subject togreat wear, as soon -as it grows loose begins to pound at that point, which renders the knifebar very liable to be broken.

Various contrivances have been made to remedy the difficulty above named, such as putting into the eye or lug a removable steel bush; also forming the lug wholly, or the upper part thereof, of steel.

These devices have been found in practice objectionable, while the mode of construction adopted by me has, after a thorough practical test, been found to remedy the defects notice able in all other constructions, and is cheaper and more practical. I

In such heels as is shown in Figure 1 it is impossible to introduce a hardened;steel eye on account of its liability to fracture, and

y where a removable busliis introduced it is liable to work loose, and is much more expensive to manufacture thanmy device.

Description of the Invention. I forge heel n of, the knife'of the proper pattern, with an enlarged eye, I), therein, either by drawing out the forging of wrought-iron in proper form and bending it round into a loop to form an eye,or drilling it out, or in anyother way forming a proper eyewell known to iron-forgers. Into this eye, either before or after the lap is welded, I insert a short cylinden or other convenientlyformed section of steel, forming a plug that fills the'e'ye, and the whole is then firmly welded together in the ordinary way of welding iron to steel.-

The parts are formed into shapeeither in dies of proper form or otherwise, andthen finished off, and the hole drilled through the center of the plug, so as to leave a ring of steel all around the hole, as is indicated by the fine line 0 on the drawing, after which the steel bush thus formed is hardenedby any of the well-known processes for hardening steel.

It is obvious that a steel thimble might be substituted for a plug, or that the steel plug might be made with a hole through its axis before Welding it in, with substantially the same result; but I deem it best to weld the plug in solid to make the best job. In either case the bushing orlining of steel must be bored out after it is welded into the wroughtiron eye.

- Claim.

I claimj A cutter-head or heel,'oonstructed as herein described, of a cutter-bar, by weldinga steel bush or plug into a wrought-iron forging, form- V ing a permanent hardened-steel lining to the eye thereof, as and for the purposes herein set forth.

Witnesses: AMOS PADGHAM.

GEORGE BARNES, GEO. E. DANA. 

